With all this hot weather I have been keeping DD (6 wks) completely out of the sun, but I wondered about when you were supposed to start using sunscreen? I've got some Johnson's SPF40 but it doesn't mention what age you can use it from. Obviously it is best to keep babies out of the sun, but every time I leave the house there is a small risk of some sun getting through so what do you do? Her hats are far too big at the moment, and she is too hot with long sleeved clothes. Help!